LibO 3.5 Beta0 doesn't install on my Windows 2008 R2 64 bits, I get an error about failing to register the extensions (not very informative) and the installation rolls back.
MSI log file attached.
Created attachment 54063 [details]
Zipped MSI log file
Zipped the MSI log file because it was too big for bugzilla.
On Windows Server 2003 I get the regular unopkg.bin error but it installs.
*** This bug has been marked as a duplicate of bug 42826 ***